package Point;

public class ObjectDemo {
    public static void main(String[] args) {
        String s1=new String("hello");
        String s2=new String("hello");
        System.out.println(s1.equals(s2));//比较内容是否相等,系统已经重写toString。
        StringBuilder s3=new StringBuilder("hello");
        StringBuilder s4=new StringBuilder("hello");
        System.out.println(s3.equals(s4));//Stringbuilder没有重写。
        System.out.println(s1.equals(s3));
        Point p1=new Point(100,200);
        Point p2=new Point(100,200);
        System.out.println(p1==p2);
        System.out.println(p1.equals(p2));
        Point p= new Point(100,200);
        System.out.println(p);
        System.out.println(p.toString());


    }
}
